NumberResearch Membership · Data 09/22/2026

Recent prefix assignments

354 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, last 30 days
8X8, INC. 39
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 20
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2011-07-25 289-780 not yet reported which blocks → Iristel Inc. 154E Hamilton —
2011-07-25 385-233 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - UT 117F PLEASATGRV UT
2011-07-25 415-266 0–9 XXXall 10 · 4 holders which blocks → U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 671J SNFC CNTRL CA
2011-07-25 450-421 not yet reported which blocks → TELUS Mobility 8303 Joliette —
2011-07-25 506-801 not yet reported which blocks → Iristel Inc. 154E Moncton —
2011-07-25 510-244 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E HAYWARD CA
2011-07-25 708-265 0–9 XXXall 10 · 4 holders which blocks → T-MOBILE USA, INC. 6529 CHICAGOHTS IL
2011-07-25 760-848 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 INDIO CA
2011-07-25 819-817 not yet reported which blocks → TELUS Mobility 8303 Drummondville —
2011-07-25 951-335 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E RIVERSIDE CA
2011-07-22 224-255 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WINNETKA IL
2011-07-22 253-329 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 AUBURN WA
2011-07-22 276-447 0–9 XXXall 10 · 4 holders which blocks → MOUNTAINET TELEPHONE COMPANY - VA 3185 MORRISONCY VA
2011-07-22 402-302 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NORFOLK NE
2011-07-22 402-819 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - NE 995E OMAHA NE
2011-07-22 408-290 0–9 XXXwhole prefix which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SUNNYVALE CA
2011-07-22 480-435 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2011-07-22 480-550 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2011-07-22 480-689 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - AZ 6572 PHOENIX AZ
2011-07-22 515-303 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - IA 985E INDIANOLA IA
2011-07-22 515-803 0–9 XXXwhole prefix which blocks → T-MOBILE USA, INC. 6529 DES MOINES IA
2011-07-22 570-415 0–9 XXXall 10 · 7 holders which blocks → CTSI, INC. - PA 7513 SUNBURY PA
2011-07-22 574-326 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ELKHART IN
2011-07-22 604-334 not yet reported which blocks → Distributel 081E Vancouver —
2011-07-22 604-335 not yet reported which blocks → Distributel 081E Vancouver —
2011-07-22 604-343 not yet reported which blocks → Distributel 081E Vancouver —
2011-07-22 623-295 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - AZ 587F PHOENIX AZ
2011-07-22 626-586 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ALHAMBRA CA
2011-07-22 647-485 not yet reported which blocks → Distributel 082E Toronto —
2011-07-22 647-486 not yet reported which blocks → Distributel 082E Toronto —
2011-07-22 647-487 not yet reported which blocks → Distributel 082E Toronto —
2011-07-22 647-488 not yet reported which blocks → Distributel 082E Toronto —
2011-07-22 647-489 not yet reported which blocks → Distributel 082E Toronto —
2011-07-22 657-235 0–9 XXXall 10 · 9 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SANTA ANA CA
2011-07-22 705-984 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Barrie —
2011-07-22 705-985 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Barrie —
2011-07-22 706-535 0–9 XXXall 10 · 8 holders which blocks → POWERTEL ATLANTA LICENSES, INC. 7473 WAYNESBORO GA
2011-07-22 714-576 0–9 XXXall 10 · 5 holders which blocks → T-MOBILE USA, INC. 6529 BUENA PARK CA
2011-07-22 720-612 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 DENVER CO
2011-07-22 786-332 0–9 XXXall 10 · 3 holders which blocks → COMCAST IP PHONE, LLC 318J MIAMI FL
2011-07-22 832-560 0–9 XXXall 10 · 2 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 BAMMEL TX
2011-07-22 925-338 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E CONCORD CA
2011-07-22 980-365 0–9 XXXall 10 · 4 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - NC 7835 CHARLOTTE NC
2011-07-21 224-245 0–9 XXXall 10 · 2 holders which blocks → T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2011-07-21 317-476 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 INDIANAPLS IN
2011-07-21 321-237 0–9 XXXall 10 · 3 holders which blocks → BANDWIDTH.COM CLEC, LLC - FL 982E MELBOURNE FL
2011-07-21 423-264 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 4 holders which blocks → COMCAST IP PHONE, LLC 318J VONORE TN
2011-07-21 581-232 not yet reported which blocks → TELUS Mobility 8303 Matane —
2011-07-21 604-356 not yet reported which blocks → Bell Mobility 6574 Vancouver —
2011-07-21 613-404 not yet reported which blocks → Rogers Communications Canada Inc. (Wireless) 8821 Ottawa-Hull —

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.